Nausea (Latin nausea, from Greek ναυσία – nausia, “ναυτία” – nautia, motion sickness”, “feeling sick,” “queasy” or “wamble”) is a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. It often, but not always, precedes vomiting. A person can suffer nausea without vomiting. (Greek ναῦς – naus, “ship”; ναυσία started as meaning “seasickness”. ) Nausea is a non-specific symptom, which means that it has many possible causes.